4.2.3 Mechanical Buttons
ATmega324PB Xplained Pro contains two mechanical buttons. One button is the RESET button connected to the ATmega324PB reset line and the other is a generic user configurable button. When a button is pressed it will drive the I/O line to GND.
: There is no pull-up resistor
connected to the generic user button. Remember to enable the internal pull-up in the ATmega324PB to use the button.
| ATmega324PB pin | Silkscreen text | Shared functionality |
|---|---|---|
| RESET | RESET | - |
| PC6 | SW0 | EXT3.9/DGI GPIO3 |